Methods and systems for increasing bandwidth efficiency in satellite communications
First Claim
1. A method for providing bandwidth efficiency in a satellite communication system, the method comprising:
- receiving, at a gateway ground station and from a plurality of user ground terminals, a plurality of source signals, wherein each of the source signals is modulated according to at least one source modulation method;
further receiving, at the gateway ground station and from the plurality of user ground terminals, a plurality of information signals corresponding to the plurality of source signals;
combining, at the gateway ground station, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before the source signals are combined; and
transmitting, by an uplink transmission from the gateway ground station to a satellite, the combined source signal, wherein the uplink transmission comprises information specifying the at least one predetermined modulation method.
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Accused Products
Abstract
Methods and systems are provided for increasing bandwidth efficiency in satellite communications. In some embodiments, a satellite communications method is provided that comprises receiving, at a gateway ground station and as part of a downlink transmission from a satellite, a combined source signal comprising a plurality of source signals with an overlapping bandwidth, and extracting, from the downlink transmission, information specifying at least one predetermined modulation method. The method also includes generating, based on the at least one predetermined modulation method and from the combined source signal, a plurality of estimated waveforms corresponding to the plurality of source signals, separating, by signal cancellation and using the plurality of estimated waveforms, the plurality of source signals from the combined source signal, and routing, with a terrestrial network, the plurality of source signals to one or more user ground terminals.
14 Citations
24 Claims
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1. A method for providing bandwidth efficiency in a satellite communication system, the method comprising:
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receiving, at a gateway ground station and from a plurality of user ground terminals, a plurality of source signals, wherein each of the source signals is modulated according to at least one source modulation method; further receiving, at the gateway ground station and from the plurality of user ground terminals, a plurality of information signals corresponding to the plurality of source signals; combining, at the gateway ground station, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before the source signals are combined; and transmitting, by an uplink transmission from the gateway ground station to a satellite, the combined source signal, wherein the uplink transmission comprises information specifying the at least one predetermined modulation method. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system capable of providing bandwidth efficiency in a satellite communication system, the system comprising:
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communication equipment at a gateway ground station that receives, from a plurality of user ground terminals, a plurality of source signals and a plurality of information signals corresponding to the plurality of source signals, wherein each of the source signals is modulated according to at least one source modulation method; a set of digital signal processors that combine, at the gateway ground station, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before the source signals are combined; and a set of transmitting antennas that transmit, by uplink transmission from the gateway ground station to a satellite, the combined source signal, wherein the uplink transmission comprises information specifying the at least one predetermined modulation method. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer-readable medium storing instructions executable by one or more hardware processors to carry out operations comprising:
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receiving, at a gateway ground station and from a plurality of user ground terminals, a plurality of source signals, wherein each of the source signals is modulated according to at least one source modulation method; further receiving, at the gateway ground station and from the plurality of user ground terminals, a plurality of information signals corresponding to the plurality of source signals; combining, at the gateway ground station, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before the source signals are combined; and transmitting, by an uplink transmission from the gateway ground station to a satellite, the combined source signal, wherein the uplink transmission comprises information specifying the at least one predetermined modulation method. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification